16685776372 has 6 divisors (see below), whose sum is σ = 29200108658. Its totient is φ = 8342888184.

The previous prime is 16685776339. The next prime is 16685776411. The reversal of 16685776372 is 27367758661.

It can be written as a sum of positive squares in only one way, i.e., 14671023376 + 2014752996 = 121124^2 + 44886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085722043 + ... + 2085722050.

Almost surely, 2^16685776372 is an apocalyptic number.

It is an amenable number.

16685776372 is a deficient number, since it is larger than the sum of its proper divisors (12514332286).

16685776372 is a wasteful number, since it uses less digits than its factorization.

16685776372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171444097 (or 4171444095 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 58.

The spelling of 16685776372 in words is "sixteen billion, six hundred eighty-five million, seven hundred seventy-six thousand, three hundred seventy-two".